She also began a part-time degree in English literature.
In 2011 a portrait of Hannigan was painted by British artist Joe Simpson; the painting was exhibited around the UK, including a solo exhibition at the Royal Albert Hall.
She was singing the ninths, the elevenths of the chords...
I mean some of the things sound like choices that Miles would have made." Hannigan eventually left University to travel with Rice across Europe with a particular focus on Italy.
Hannigan's music has received award nominations both in Ireland and the USA.These recordings included: "Willy" by Joni Mitchell, "Be My Husband" by Nina Simone (from the 1965 album Pastel Blues), "Mercedes Benz" by Janis Joplin and "Love Hurts" by Boudleaux Bryant.Hannigan also performed live with her own band, called The Daisy Okell Quartet and contributed guest vocals to the recordings of Mic Christopher, The Frames and Herbie Hancock.Returning to Ireland, both Hannigan and Rice began to work together recording music.Hannigan featured on Rice's first two solo albums and a number of EP's and live recordings.Hannigan is also the voice actor for the character Blue Diamond in Steven Universe, an American animated television series created by Rebecca Sugar and is the voice of Bronagh in the 2014 animated film Song of the Sea.Some of Hannigan's live recordings were made available through trading networks radio shows.As part of an advertisement campaign for Oxfam's Make Trade Fair, Hannigan was drenched in melted chocolate and she participated in the Irish musical collective The Cake Sale with lead vocal on the track Some Surprise, which was played on the US television series Grey's Anatomy.Hannigan recorded her second album, Passenger, at Bryn Derwen Studios in North Wales with producer Joe Henry and engineer Ryan Freeland.In 2014 she voiced the character of Bronagh, the Selkie mother of the main characters in the animated film Song of the Sea, and provided several songs to the film's soundtrack.In 2015, she sang a version of "Danny Boy" for the seventh episode of the second season of Fargo.